package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义切面，实现自动填充
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /**
     * 拦截需要自动填充的类
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){

    }
    @Before("autoFillPointCut()")
    public void  autoFill(JoinPoint joinPoint)  {
        log.info("开始进行数据填充");
        //获取参数,当前数据库操作的类型
        MethodSignature methodSignature = (MethodSignature)joinPoint.getSignature();//获取方法签名对象
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);//获取方法上的注解对象
        OperationType value = autoFill.value();//获取数据库的操作类型
        //获取到当前被拦截方法的参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return ;
        }
        Object entity = args[0];
        //准备要赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        //根据不同的操作类型，为对应的属性赋值
        if (value == OperationType.INSERT) {
            try {
                Method setCreateTime =entity.getClass().getMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime =entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser =entity.getClass().getMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser =entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射设置属性值
                setCreateTime.invoke(entity, LocalDateTime.now());
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());

            } catch (Exception e) {
                e.printStackTrace();


        }
        }else if (value==OperationType.UPDATE) {
                try {
                    Method setUpdateTime =entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                    Method setUpdateUser =entity.getClass().getMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                    //通过反射设置属性值
                    setUpdateTime.invoke(entity, LocalDateTime.now());
                    setUpdateUser.invoke(entity, BaseContext.getCurrentId());

                } catch (Exception e) {
                    e.printStackTrace();
            }

        }


    }
}
